Compensation structure for reducing circulating current in window of transformer and transformer comprising compensation structure

A compensation structure for reducing circulating current in a window of a transformer, the transformer comprising a winding, a metal frame and leads located at one side of the frame and spaced apart from the frame, the frame comprising borders and an iron core located inside a window enclosed by the borders, the winding being provided around the iron core, wherein the compensation structure comprises:

• at least one compensator provided on the borders of the frame,
• wherein the at least one compensator is made of silicon steel sheets of a magnetic material,
• wherein the at least one compensator separates at least a part of the borders the frame from a part of the leads,
• wherein one or more compensators in the at least one compensator each have an annular structure extending around the border of the frame, and
• wherein the one or more compensators each comprise a first half and a second half connected to each other, wherein there is a gap between the first half and the second half, and the cross-sections, in a direction perpendicular to a vertical axis of the borders of the frame, of the one or more compensators are circular or rectangular.